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Finding the Fourth Proportional to 540.58, 745.98 and 319.48

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Solution

The fourth proportional to 540.58, 745.98 and 319.48 is: 440.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.58 : 745.98 = 319.48 : x
  2. Step 2: Convert to fraction form
    540.58/745.98 = 319.48/x
  3. Step 3: Cross multiply
    540.58x = 745.98 × 319.48
  4. Step 4: Simplify right side
    540.58x = 238,325.69
  5. Step 5: Solve for x
    x = 238,325.69/540.58
  6. Step 6: Final answer
    x = 440.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.